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How to Convert AVI to 3GP with 3GP Video Converter
What will you do if you want to play AVI video or movie on your mobile phone? The most feasible way is to convert the video or movie to .3GP files with a workable 3GP video converter. Here we recommend Aimersoft Video Converter, which can help to convert videos to 3GP(such as WMV to 3GP, MP4 to 3GP, etc)efficiently.
Download Video Converter here>>, then install and run it.
1 Add AVI video files
Click the 
button to add your video files. This Video Converter support batch conversion, so you can import multiple files at a time.
2 Select output format and destination folder
Click the "Profile" drop-down list and select "Mobile Phone" > "Mobile Phone Video 3GP (*.3gp)" for the added video files you need to convert. Then select a proper destination folder from the drop-down list of "Output".
If you want to customize the output quality, click "Advanced.." button to open the settings panel, where you can set resolution, frame rate, video bit rate, audio bit rate, sample, etc.
3Edit video (optional)
Click 
or 
on the top of the main interface, you can then customize the videos.
Crop: Customize the frame size (16:9, 4:3 etc) and cut off black margins.
Effect: Set the brightness, contrast, saturation of the video and apply different movie styles.
Watermark: Add image or textual watermark to videos.
Clip: Trim your favorite part from the video to convert for you Zune
Settings: Click "Advanced.." button next to "Profile"; you can set the video resolution, frame rate, audio channels, bitrates etc.
4Start to convert AVI to 3GP
When every think done, click "Start" button to convert AVI video to 3GP! If you want to join several video files to one file, on the main interface, check "Merge into one file", and you will get one output file.